Quickly! will give brainliest if i can! : )

juan drew a circle with a radius of 4 cm. he drew two radii that formed a 150 degrees angle. he used the steps below to find the area of the sector formed by the 150 degrees angle.

area of circle: a = pi r squared = pi 4 squared = 16 pi

area of sector: startfraction 16 pi over a endfraction = startfraction 150 over 360 endfraction. 150 a = 5,760 pi. a = 38.4 pi.

what error did juan make in finding that the area of the sector is 38.4 pi centimeters squared?
he found an incorrect area for the entire circle.
he set up the proportion incorrectly.
he solved the proportion incorrectly.
he used the area of the circle instead of the circumference.